Magnetic interactions in hematite small particles obtained by ball-milling

R. A. BORZI; SILVANA JACQUELINE STEWART; G. PUNTE; R. C. MERCADER; R. ZYSLER; M. VASQUEZ-MANSILLA; E. D. CABANILLAS

Journal of Magnetism and Magnetic Materials

Año: 1999 vol. 205 p. 234 - 240

Pure hematite particles of an average size of 14 nm were obtained after ball milling a-Fe2O3in a vertical vibrating mixer mill for 10 h. MoK ssbauer and magnetization measurements indicate the existence of strong interparticle interactions that can be varied by the dispersion of the particles in di!erent ways